Hydraulic control valve



Nov. 12, 1940. A. A. TRAMBLY 2,221,462

HYDRAULIC CONTROL VALVE Filed Jan. 19, 1958 2 Sheets-Sheet 2 ,fl le 33 2' 'U l E- Q T| 18 Ira-- 9 2r. 20 [9 22 34 f-Jf-/-JS wvo/who@ Alfred mbly Patented Nom-12., 1940.

f/,UNi-TED STATES- PATNT OFFICE masonic Acols'l'lii'ol. vanvn Alfred A. rnmlily, Lincoln, Nebr. Application Jennery ls, 193s, sci-iol No;A 135,717

s (ci. g77-4s) o I MyK invention relates hydraulic control valves for selectively controlling a plurality o! jacks or rams', its primary vobject being the provision of a .novel system for the operation of a plurality of hydraulicjacks or rams and of a mechanism for the control of a plurality of jacks or rams by.

and simple and designed for almost instant opera- A tion; i

i Another object which I have in view is the provision o! a lubricated valve structure .in which there is no leakage of oil,-but which is so designed as to prevent the building up oi 'undesirable pressures in the' oil by draining the oil into` an oilreservoir. 'l

Having in view these objects and othersh which 0 will be pointed out in the following description, I`

will now refer to the drawings, in which i Figure 1 is a viewin vertical section oivmy hydraulic control valve. s i

Figure 2 is a vertical section of .the saine valve on n plone perpendicular io niet or giedre i, the plane ,of the section being indicated by the line 2 -2 oi'Flgure 1; Figure 3 is; a diagrammatic view of the entire valve system as applied for the control o f three` 3 jacks or rams.

Figure i le n seccional view en the line `4 4` of Figure l as seenin the direction indicated by Y the arrows. L,

Figure 5 is a sectional view taken ony the line 85 s-s'oi Figure 1 es seen inthe direction indicated bythearrow'af A Figure 6 is a plan 'view of the valve and showing "-'particularly the operating level' and its connections. 40 Figure 'l is a. vertical sectional view showing the operating valve'memberV in operative position.r

Figure 8 is -avlew similar to Figure 'I but showiog the operating valve member in releasing posin 45 i e'l'lie linee lo isin the foi-in' of e cylindrical cesiing arranged for supporting all of the moving parts' of the valve and controls. It may be secured to a-fioor or platgorm in anysuitable manner. Thebase il is provided with a Irusto- -50conica1 cavity having a vertical axisiand the opening at-the bottol'u of the -base Il is screw threaded iolthe reception of a plug! l. The base llalsohnstwomrtsll ndllwhlchlieina' through this cavity and and i4 are cylindrical and they 'are screw threaded for securing thereto certain connections-to be subsequently described. y

The base III with its cavity thus serves as the female member of a valve which is designed for 5 the selection oi the desired jack which is to operated. Rotatably seated within the cavity oi the base Ill'is the male member i5 of the same' valve. This is held in place by means @i the plug i i and the-coiled spring iB bearinggagainst the l0 lower or larger surface of the valve member i5. The block I'l is secured in horizontal position to the valve'member I5 by means o! screws or bolts` i! orthe like as shown in Figure 2. ,The valve l member i5 is provided with a-passageway I9 com- 15 municating withthe port' I2, a passageway 20 communicating with the port I3, and a passageway 2| communicating with a selected one of the prts il. These threepassageways extend through the lower wall of the block i1, the gasket -22bei'ng pertured so that the passageways are vmember Iiwand the upper wall of the base I0. 'The valve member i5 is rotatable about its vertical agis in the base im' 'I'he block I1 is provided with a horizontally positioned frusta-conical cavity as best shown in Figure 1. This cavity is closed at one end by the plug 25. The male' valve member 28 Vpasses \is urged into a tight relation in the cavity by nfeans of the coiled spring 21. The annulus 28 surrounds the valve member 35 2B for making a tight joint between the two valve members 'i1 and 28, the, joint being further tightened by means. o fpacking 29. The upper valve, which may be regarded as the operating valve, consists of the female member I1 and the 40 male member, 2i, the member 26 being rotatable in the member l1. Since the liquid used in both valves is oil under high pressure,`it.is necessary that the joints -be tight during the rotation of the two valve members.

The valve member 26 is provided with three sockets 30, 3i, and 32. Their shape is bestshown in Figure 2. These sockets are-somewhat elongated as shown in Figures l, '1, and 8, ,but they are'narrower thanthe passageways with which 5 they communicate. The walls. of the passageways through the lower wall of the bloei; I1 are Vtherefore inclined as shownin Figure 2; In the" neutral position of the upper valve the socket 3| spans the openings to .the two passageways I9 and 20 as shown in vFigure 1. In the operative position the socket 30 communicateswith the passageways 20 and 2| as shown in Figure 7. In the releasing position the socket 32 communicates with all three passageways |9, 20, and 2| as shown in Figure 8. These three .positions are obtained by the rotation of the valve member 26 in les.

the block l1. A

For rotating the valve member 26 I employ a lever 33 which is keyed or otherwise secured to the projecting end of the valve member 26 and loosely secured to the projecting portion of the plug 25. The lever may assume any of the three positions shown in Figure 2 inorder to bring one of the sockets into alignment with the selected passageways I9, 2D, and 2|. The lever is connected to a yoke having .two arms 34 as best shown in Figure 6. By means of this construction the valve member 26 may be rotated within limits about its horizontal axis as shown in Figure 2, or the valve member I5 may be rotated about its vertical axis as shown in Figure 6.

In use the control valve is connected in an oil circuit as shown in Figure 3. The port I2 is connected through a conduit 35 with an oil reservoir The port I3 is connected through a conduit 131 with a high pressure pump 38. The reser- Vvoir 36 and the pump 38 are also connected to each other. When the parts are in the neutral position shown in Figure 1, the' oil is forced inwardly through the port I3, through the passageway 20, through the socket 3| and thence through the passageway I9 and port I2 into the oil reservoir 36. ,l The circulation established by the pump is complete. If itis desired to operate one of the jacks 39 which are connected to the respective ports I 4, the Handle 33 is raised into the position shownin Figure '7 so that the oil will pass from the passageway 20, through the socket and into the passageway 2|. The leverI 33 is then pushed into one of the positions shown in Figure 6in order to bring the port 2| into registration with the selected one ofthe ports It.

, This will immediately raise the selected jack.

After this operation has been completed, the lever 33 is. depressed'through a vertical arc to rotate the valve memberl 26 into the position shown in Figure 8f in `which thesocket 32 communicates with all three passageways I9, 20, and 2|. weight of the jack with the weight of the parts supported by the jack will cause the oil to flow back through the socket 32 and thence through the passageway I9 back into the oil reservoir. Attention is called to the fact that the passageway I9 has a considerably greater diameter than that of either passageway 20 or 2|. In the release position of the valve the oil is forced upwardly through the passageways 20 andA 2| so that the passageway I9 must have a diameter sui.- ciently large to carry all of the oil to the reservoir without any back pressure. It is thus possible to raise, hold in raised position, or lower the jack while continuously operating the pump.

The parts are all lubricated by the oil which is used in the operation of the valve. This oil is prevented from leaking out from the valve by means of the packing and other tight joints which prevent leakage. A thin lm of oil thus surrounds the major portions of the two valve membersv I5 and 26. The springs I6 and 21 normally maintain just suflicient pressure on the two valve members ,I5 and 26 to keep them firmly seated within their sockets. The pressure exerted by the pump 38 may, however, set up excessive pressures-at the larger ends of the twofrusto-conical The members so as to make operation diflicult or impossible. I nd it necessary to provide means for relieving the pressure thus exerted. These pressures are apt to be .greatest between .the valve member I5 and the plug I and between the valve member Z6 and the plug 25. In Figure 2 I show an annular groove 40 surrounding the valve member I5, this groove being connected at one side of the valve member through a passageway 4| with the space at the bottom of -the valve member I5. As shown in Figure 1,-the passageway 4I has an opening into the port I2 so that any oil under excessive pressure will be forced into the oil reservoir. In the. same manner, the oil in the annular groove d2 will pass through the passageway 53 and through the space between the valve member 26 and the plug 25 and from thence through the passageway IM. The passageway M communicates with the passageway i9 so that any oil which is forced through the passageway 'M will be drained into the oil reservoir.

While my valve control is adapted for use wherever a single control is needed for actuating any one of a plurality of mechanisms, the initial and primary purpose-of my valve control is for lapplication to such highway implements as maintaners and snow plows. These implements are often designed for raising and lowering and for tilting-in several planes. Usually a plurality of jacks is employed with individual controls in the cab of the truck. Quick decisions on the part of the operator are often required and Ithis is apt to confuse the operator in the selection of the proper control. In my device the decision may be made quickly, and the action of the single control becomes largely reflex. Moreover, the availablespace within the cab of a truck is exceedingly limited but my device is so compact that it requires very little room.

My invention is shown and described as used in connection with three jacks but it is evident that its usefulness is not thus limited. Whenever there are two or more jacks which should have a single individual control, the valve control as above described will perform the function. The possible number of jacks to be actuated is almost unlimited, being limited only by the amount of space available and the character of the material used in its construction.

Having thusdescribed my invention in such fu-ll, clear, and exact terms that its construction and operation will be readily understood by others skilled in the art to which it pertains, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A valve including a stationary female member with a cavity therein, a male member rotatably seated in the cavity of said femalev member, Asaidfemale member having a plurality of passages therein in communication with said cavity andfsaid male member having a plurality of passages one of which is adapted to be selectively moved intolcommunication with any one of a group of said plurality of passages in said female to said male member, said handle member being Y operative when moved about its pivotal axis tol actuate said further valve means and when moved v l 2,221,462 about the axis of rotation of said male member to rotate said male valve member.

2. A valve including a stationary female member with a cavity therein, a male member rotatably seated in the cavity of said female member, said female memberV having a plurality of pas? sages therein in communication with said cavity and said male member having a plurality of passages one of which is'adapted to be selectively moved into communication with'any one of a group of said plurality of passages in said female member upon rotation of said male member and two others of which are continuously in communication with two others of said plurality of passages in said female member, further valve means associated with said male member and controlling the flow between the passages of the male member, and a handle member pivotally secured to said male member, said handle member being operative when moved about its pivotal axis to actuate said further valve means and when moved about the axis of rotation of said male member to rotate said male valve member.

3. A valve including a stationary femalemember with a cavity therein, a male member rotatv 3 ably seated in the cavity of said female member.

'said female member having a plurality of passages therein in communication with saidcavity, said male member having a first .passage Iwhich is adapted to be selectively moved into communication with any one of a group of said .plural'ity of passages in said female member upon rotation of said male member and second and third `passages which are continuously in comf'munication with two others of Asaid plurality of passages-in said female member, further valve means in said male member and controlling the flow between the .passages of the male member, and a handle member pivotally secured to said male member, said handle member being opera-- tive when moved about its pivotal axis to cause said further valve means'selectively to establish communication between all three of said passages .in said male member, between said first and third passages, or between said second and third passages, and said handlemember being operative when moved about the axis of rotation of said male member to rotate said male valve member.

vArr-'REU A. TRAMBLY. 

